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No one knows ______effects the GM material might have on the food chain.
A.whatB.whichC.whoseD.how
A

试题分析:考查宾语从句,what在宾语从句中可做主宾表和定语,这里what修饰effects,句意是:每人知道GM材料会对食物链有什么样的影响。选A。
点评:如果宾语从句缺少主宾表和定语要考虑用what,做题是关键时分析句子成分。
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